Development of YBCO-coated conductors for electric power applications

Biaxially textured MgO template films have been fabricated on a Ni-based alloy substrate (Hastelloy C276) by inclined-substrate deposition (ISD). using electron beam evaporation, at the high deposition rate of 120-300 nm/min. Buffer films were subsequently deposited on these template films, and YBCO films were finally deposited by pulsed laser deposition (PLD). Crystal textures of the YBCO films were examined by X-ray pole figure, phi- and omega-scans analysis. Good in-plane and out-of-plane textures were observed. with MgO(0 0 2) phi-scan full-width-at-half-maxi mum (FWHM) of 10.0degrees and omega-scan FWHM of 5.5degrees, for a film deposited with an incline angle of 55degrees. YBCO films were epitaxially grown on ISD MgO-buffered Hastelloy C276 substrates by PLD. T, of 90 K with sharp transition and transport J(c) of approximate to1.4 x 10(5) A/cm(2) were obtained on a 0.5-mum-thick YBCO film at 77 K in zero field. (C) 2002 Elsevier Science B.V. All rights reserved.